Air can be polluted by particles and gases that come from vehicle exhaust. This is because they release very high amounts of carbon monoxide.
Pollution can occur due to industrial emissions. Carbon dioxide is released out into the atmosphere due to burning fossil fuels. More than 50% of the greenhouse gases are due to industry and electrical generating factories.
Forest fires, volcanoes, and dust storms across the world all contribute to the amount of air pollution in the environment.
Air can get polluted due to agricultural and construction activities. Ammonia is often a by-product of farming operations and construction produces a lot of dust and particle waste. Pesticides and fertilizers are also responsible for putting a lot of really gross chemicals in the atmosphere.
